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Fujifilm XF 80mm F2.8 R LM OIS WR Macro — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published US20180246292A1 optical prescription (16 elements in 12 groups, 2 aspherical) with a 28.6 mm entrance pupil and 0.25 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US20180246292A1 · 16 elements in 12 groups (2 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 28.6 mm (at f/2.8) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 58% at f/2.8 (≥86% from f/5.6) · -0.8 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 16° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 4.89 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 81.8 mm (+2.2%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 61 cm (4.60 m – 5.21 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.25 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Fujifilm XF 80mm F2.8 R LM OIS WR Macro produce?
Wide open at f/2.8, the Fujifilm XF 80mm F2.8 R LM OIS WR Macro has a 28.6 mm entrance pupil (80 mm ÷ 2.8) and 58% bokeh roundness in the 90% corner (-0.8 EV corner falloff, reaching ≥86% roundness from f/5.6). In an upper-body portrait at 4.89 m, the sharp depth-of-field zone spans 61 cm (4.60 m to 5.21 m) with a 16° horizontal background angle of view.
Does the Fujifilm XF 80mm F2.8 R LM OIS WR Macro show focus breathing at portrait distance?
Based on patent US20180246292A1, tracing the focusing group at 4.89 m gives an effective framing focal length of 81.8 mm (+2.2% vs. the nominal 80 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Fujifilm XF 80mm F2.8 R LM OIS WR Macro?
The patent prescription (US20180246292A1) specifies 16 lens elements in 12 groups with 2 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Fujifilm XF 90mm F2 R LM WR
- Fujifilm XF 60mm F2.4 R Macro
- 75mm APS-C vs 110mm full frame focal length comparison
- 80mm medium format vs 85mm full frame focal length comparison
- 90mm APS-C vs 135mm full frame focal length comparison
- 35mm vs 85mm focal length comparison
Compare with similar portrait lenses
- Nikon 85mm f/3.5 VR DX
- Nikon 85mm f/2.8 PC-E FX
- Sony FE 90mm F2.8 Macro G OSS
- Leica TELE-ELMARIT-M 90mm f/2.8
- Sony E 50mm F1.8 OSS
Also see: depth of field, bokeh, crop factor, lens compression.